In 2009 I doorbusted a 32 in. Sony Bravia LCD TV for my dorm room. Knocked $250 off the price (allegedly) and I ended up with a excellent TV that I wouldn't have been able to afford on a normal shopping day. Still looks and sounds as good as the day I bought it while my roommate of the time's Vizio is rotting in a landfill.
That was right around start of the black friday craze though, When I went out last year most of the deals we're fairly underwhelming.